Force-pump



(No Model.) 2 Sheets-Sheet 2.

J. W. POWERS.

FORGE PUMP.

No. 425,389. Patented Apr. 8, 1890.

UNITED STATES PATENT rrrcni JAY \V. POWERS, OF NINNETKA, ASSIGN OR TO THE HYDRO-PNEUMATIC lllANUFAGTUR-ING COMPANY, OF CHICAGO, ILLINOIS.

FORCE-PUMP.

SPECIFICATION formingpart of Letters Patent No. 425,389, dated April 8, 1890. Application filed December 14, 1888. fierial No, 293,560. (N model.) i

To all whom it may concern: The piston C consists of a short cylinder Be it known that l, JAY WV. POWERS, a citifitting an interior chamber of the plunger D zen of the United States, residing alt-Tin and a rod O extending therefrom outward netka, in the county of Cook and State of Illithrough the stufiing-box g of the head I). nois, have invented new and useful Improve- The plunger D is constructed as follows: 5 5 ments in Force-Pu mps, of which the following Upon its outer surface at or near its opposite is a full, clear, and exact description, referends are placed annular packing-rim gs Z Z, fitencebeing hadtothe accompanying drawings, ting the chamber 6 closely. Between these which form a part of this specification, wh erepacking-rings Z lis an annular groove m,which ID in should be about half as long as the chamber 60 Figure 1 is a side elevation; Fig. :2, a longie, to the end that it shall at all times be in tudinal section; Fig. 3, an end view of the communication with the suction-pipe c. It body or principal part-with itsheads removed; is further provided with an interior longi- Fig. i, a cross-section from a to a; Fig. 5, a tudinal chamber n, into either end of which longitudinal section of a modified construcrings or glands o 0 are secured, thus making 65 tion; Fig. 6, another modification, and Fig. 7 the chamber 7t smaller in diameter at its still another modified form. opposite ends, and leaving a cylindrical re- Like letters refer to like parts in the sevcess p in its center somewhat longer than the eral views. piston 0 designed to reciprocate therein.

A is an air-chamber; B, the body or prin- This recess 1), which is somewhat longer than 70 cipal part; 0, the piston, and D the plunger. the piston G, communicates with the annular The air-chamber is not unlike that of any groove m by means of the ports q and q, 10- other pump either in construction or operacated near its opposite ends. These ports tion. should be such a distance apart that the pis- The body B is furnished with the heads 17 ton 0 when at half-stroke shall just cover 7 5 and Z), the suction-pipe c, the discharge-pipe both of them, thus providing for a lap when (Z, and the parallel longitudinal chambers e the piston is atfull stroke in either direction. and f. The head I) is provided with a stuff- The operation of my pumpis as follows: ing-box g, of the usual construction. The Starting with the plunger D at the innerend '50 suction-pipe c is centrally located on the body of the chamber 2, (power being applied to the So B-that is to say, midway between its oppopiston-rod G,) the piston 0 first moves cutsite ends-and is provided with the flange h, ward without imparting motion to the plunto which connecting-pipes may be attached. ger 1) until it contacts with the gland o, The discharge-pipe (1 may be located at any which forms for it a seat. Through this op- 5 desired position upon the body B, (provided. oration the ports q, communicating with the 85 always that it communicates with the chaminner end of the chamber 6-, are opened, and her f,) but preferably opposite the suction the ports q, communicating with its outer pipe 0, as shown. The longitudinal chamber end, are closed; and,as the piston 0 con- 6, within which the plunger D reciprocates, tinues on its outward stroke, carrying the 0 must be cylindrical and smooth andof uniplunger D along with it, the imprisoned fluid 0 form diameter. It communicates with the in the outer end of the chamber c is forced chamber f by means of the ducts i and z", 10- outthrough the duct t",the longitudinal chamcated at their extreme ends, the two chambers ber f, and the dischargepipe d, the ball 7c being of equal length, and having their ends moving to its seat 1', which prevents the fluid 5 covered by the heads 1) and b. The longifrom flowing into the inner end of the cham- 5 tndinal chamber f has at its central portion, her a, while at the same time fluid is flowing or directly beneath the discharge-pipe d, an in through the suction-pipe c, the annular enlarged portion or recess j,within which the groove m, and the ports q to fill the inner end ball 70 is placed, which operates as a double of the chamber e, made vacant by the outcheck-valve. ward stroke of the plungerD. In the reverse I00 operation the piston O first moves inward without imparting motion to the plunger D until it contacts with the gland 0. Through this operation the ports q, communicating with the outer end of the chamber 6, are opened, and the ports q, communicating with its inner end, are closed; and as the piston O continues on its inward stroke, carrying the plunger D along with it, the imprisoned fluid in the inner end of the chamber 6 is forced out through the duct 'i, and the longitudinal chamber f, and the discharge-pipe cl, the ball 70 moving to its seat T, which prevents the fluid from flowing into the outer end of the chamber e, while at the same time fluid is flowing in through the suction-pipe c, the annular groove m, and the ports q, to fill the outer end of the chamber 6, made vacant by the inward stroke of the plunger D.

In the modified construction shown in Fig. 5, Sheet 2,. I dispense with the longitudinal chamber f as an integral part of the body B, and substitute therefor the detachable elbows s, pipes t, and three-way T to, within which I place the ball 7c, and to which I attach the discharge-pipe cl and air-chamber A. The operation of this modified construction is substantially the same as that of the one shown in Figs. 1, 2, 3, and at, and needs no repetition.

In the modification shown in Fig. 6 I substitute for the ball k a short cylinder o, reciprocating within the recess j of the longitudinal chamber f.

In the modified form shown in Fig. 7 I place the valve-chamber 3' above and outside the body B and have it communicate with the chamber f by meansof two ports w and w, but close the chamber between the ports, thus dividing the chamber f into two chambers or passages, the two outer ends of which communicate with the longitudinal chamber e and the two inner ends with the valve chamber j Within this valve-chamber 7' I place the short cylinder or valve 10 which operates (through its reciprocating motion) to alternately open and close the ports w and w.

distance therein without imparting motion to the plunger D, whereby the ports q and q are alternately opened and closed,:and the plun-' ger D, provided with annular packing-rings Z Z, the annular groove m, the recess 19, and

the ports q and q, connecting the groove m and the recess p, the whole being arranged and operated substantially as and for the purposes set forth.

In' testimony whereof I afiix my signature in the presence of two witnesses.

JAY W. POWERS.

Witnesses:

L. A. POWERS, I. B. PowERs. 

